From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0CFDCC433F5 for ; Fri, 10 Dec 2021 19:16:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343581AbhLJTUF (ORCPT ); Fri, 10 Dec 2021 14:20:05 -0500 Received: from sin.source.kernel.org ([145.40.73.55]:59972 "EHLO sin.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1343580AbhLJTUE (ORCPT ); Fri, 10 Dec 2021 14:20:04 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sin.source.kernel.org (Postfix) with ESMTPS id B4624CE2D28; Fri, 10 Dec 2021 19:16:27 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1097CC341C7; Fri, 10 Dec 2021 19:16:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1639163785; bh=W0q5cFFAWXl+XlrDPBGWAtYOqBLtk6keqTwXC3dVb+I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=snaaNAvS3LXWBzSaYbbypJKhu2/vwmvM9oZJzRyfc7oWGVSVCgH9mx/OOqaCQfqH8 vkcJ/eX20Nhxe+TnXOqCbqojLPkGC+MQJ1g+S1VAahxfYK0DB8Fu2fJpX7miimNbT9 9CvfoZ0q2yJYNiktOfXxPOHCay7dI3X4vS+tGEdirrT2mexilQXpGkZOlMCXDY5880 QRtcwnLZC0i9x8h+0hViRnZFu44xfBxME5cEO0+ohwWL12UdPzQo5kR9wYOVvPa9Ym pxvk3goayO6AjlpYTmVbaGTHDNYPiVV2PGWAQG6a974F0wBHoLC747YhhqXV3/311C ZFTyLgXHlFxWQ== From: Lorenzo Bianconi To: bpf@vger.kernel.org, netdev@vger.kernel.org Cc: lorenzo.bianconi@redhat.com, davem@davemloft.net, kuba@kernel.org, ast@kernel.org, daniel@iogearbox.net, shayagr@amazon.com, john.fastabend@gmail.com, dsahern@kernel.org, brouer@redhat.com, echaudro@redhat.com, jasowang@redhat.com, alexander.duyck@gmail.com, saeed@kernel.org, maciej.fijalkowski@intel.com, magnus.karlsson@intel.com, tirthendu.sarkar@intel.com, toke@redhat.com Subject: [PATCH v20 bpf-next 17/23] bpf: selftests: update xdp_adjust_tail selftest to include multi-buffer Date: Fri, 10 Dec 2021 20:14:24 +0100 Message-Id: X-Mailer: git-send-email 2.33.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org From: Eelco Chaudron This change adds test cases for the multi-buffer scenarios when shrinking and growing. Co-developed-by: Lorenzo Bianconi Signed-off-by: Lorenzo Bianconi Signed-off-by: Eelco Chaudron --- .../bpf/prog_tests/xdp_adjust_tail.c | 131 ++++++++++++++++++ .../bpf/progs/test_xdp_adjust_tail_grow.c | 10 +- .../bpf/progs/test_xdp_adjust_tail_shrink.c | 32 ++++- 3 files changed, 166 insertions(+), 7 deletions(-) diff --git a/tools/testing/selftests/bpf/prog_tests/xdp_adjust_tail.c b/tools/testing/selftests/bpf/prog_tests/xdp_adjust_tail.c index 3f5a17c38be5..d21e0a597b3c 100644 --- a/tools/testing/selftests/bpf/prog_tests/xdp_adjust_tail.c +++ b/tools/testing/selftests/bpf/prog_tests/xdp_adjust_tail.c @@ -130,6 +130,133 @@ static void test_xdp_adjust_tail_grow2(void) bpf_object__close(obj); } +void test_xdp_adjust_mb_tail_shrink(void) +{ + const char *file = "./test_xdp_adjust_tail_shrink.o"; + __u32 duration, retval, size, exp_size; + struct bpf_program *prog; + struct bpf_object *obj; + int err, prog_fd; + __u8 *buf; + + /* For the individual test cases, the first byte in the packet + * indicates which test will be run. + */ + obj = bpf_object__open(file); + if (libbpf_get_error(obj)) + return; + + prog = bpf_object__next_program(obj, NULL); + if (bpf_object__load(obj)) + return; + + prog_fd = bpf_program__fd(prog); + + buf = malloc(9000); + if (CHECK(!buf, "malloc()", "error:%s\n", strerror(errno))) + goto out; + + memset(buf, 0, 9000); + + /* Test case removing 10 bytes from last frag, NOT freeing it */ + exp_size = 8990; /* 9000 - 10 */ + err = bpf_prog_test_run(prog_fd, 1, buf, 9000, + buf, &size, &retval, &duration); + + CHECK(err || retval != XDP_TX || size != exp_size, + "9k-10b", "err %d errno %d retval %d[%d] size %d[%u]\n", + err, errno, retval, XDP_TX, size, exp_size); + + /* Test case removing one of two pages, assuming 4K pages */ + buf[0] = 1; + exp_size = 4900; /* 9000 - 4100 */ + err = bpf_prog_test_run(prog_fd, 1, buf, 9000, + buf, &size, &retval, &duration); + + CHECK(err || retval != XDP_TX || size != exp_size, + "9k-1p", "err %d errno %d retval %d[%d] size %d[%u]\n", + err, errno, retval, XDP_TX, size, exp_size); + + /* Test case removing two pages resulting in a non mb xdp_buff */ + buf[0] = 2; + exp_size = 800; /* 9000 - 8200 */ + err = bpf_prog_test_run(prog_fd, 1, buf, 9000, + buf, &size, &retval, &duration); + + CHECK(err || retval != XDP_TX || size != exp_size, + "9k-2p", "err %d errno %d retval %d[%d] size %d[%u]\n", + err, errno, retval, XDP_TX, size, exp_size); + + free(buf); +out: + bpf_object__close(obj); +} + +void test_xdp_adjust_mb_tail_grow(void) +{ + const char *file = "./test_xdp_adjust_tail_grow.o"; + __u32 duration, retval, size, exp_size; + struct bpf_program *prog; + struct bpf_object *obj; + int err, i, prog_fd; + __u8 *buf; + + obj = bpf_object__open(file); + if (libbpf_get_error(obj)) + return; + + prog = bpf_object__next_program(obj, NULL); + if (bpf_object__load(obj)) + return; + + prog_fd = bpf_program__fd(prog); + + buf = malloc(16384); + if (CHECK(!buf, "malloc()", "error:%s\n", strerror(errno))) + goto out; + + /* Test case add 10 bytes to last frag */ + memset(buf, 1, 16384); + size = 9000; + exp_size = size + 10; + err = bpf_prog_test_run(prog_fd, 1, buf, size, + buf, &size, &retval, &duration); + + CHECK(err || retval != XDP_TX || size != exp_size, + "9k+10b", "err %d retval %d[%d] size %d[%u]\n", + err, retval, XDP_TX, size, exp_size); + + for (i = 0; i < 9000; i++) + CHECK(buf[i] != 1, "9k+10b-old", + "Old data not all ok, offset %i is failing [%u]!\n", + i, buf[i]); + + for (i = 9000; i < 9010; i++) + CHECK(buf[i] != 0, "9k+10b-new", + "New data not all ok, offset %i is failing [%u]!\n", + i, buf[i]); + + for (i = 9010; i < 16384; i++) + CHECK(buf[i] != 1, "9k+10b-untouched", + "Unused data not all ok, offset %i is failing [%u]!\n", + i, buf[i]); + + /* Test a too large grow */ + memset(buf, 1, 16384); + size = 9001; + exp_size = size; + err = bpf_prog_test_run(prog_fd, 1, buf, size, + buf, &size, &retval, &duration); + + CHECK(err || retval != XDP_DROP || size != exp_size, + "9k+10b", "err %d retval %d[%d] size %d[%u]\n", + err, retval, XDP_TX, size, exp_size); + + free(buf); +out: + bpf_object__close(obj); +} + void test_xdp_adjust_tail(void) { if (test__start_subtest("xdp_adjust_tail_shrink")) @@ -138,4 +265,8 @@ void test_xdp_adjust_tail(void) test_xdp_adjust_tail_grow(); if (test__start_subtest("xdp_adjust_tail_grow2")) test_xdp_adjust_tail_grow2(); + if (test__start_subtest("xdp_adjust_mb_tail_shrink")) + test_xdp_adjust_mb_tail_shrink(); + if (test__start_subtest("xdp_adjust_mb_tail_grow")) + test_xdp_adjust_mb_tail_grow(); } diff --git a/tools/testing/selftests/bpf/progs/test_xdp_adjust_tail_grow.c b/tools/testing/selftests/bpf/progs/test_xdp_adjust_tail_grow.c index 199c61b7d062..53b64c999450 100644 --- a/tools/testing/selftests/bpf/progs/test_xdp_adjust_tail_grow.c +++ b/tools/testing/selftests/bpf/progs/test_xdp_adjust_tail_grow.c @@ -7,11 +7,10 @@ int _xdp_adjust_tail_grow(struct xdp_md *xdp) { void *data_end = (void *)(long)xdp->data_end; void *data = (void *)(long)xdp->data; - unsigned int data_len; + int data_len = bpf_xdp_get_buff_len(xdp); int offset = 0; /* Data length determine test case */ - data_len = data_end - data; if (data_len == 54) { /* sizeof(pkt_v4) */ offset = 4096; /* test too large offset */ @@ -20,7 +19,12 @@ int _xdp_adjust_tail_grow(struct xdp_md *xdp) } else if (data_len == 64) { offset = 128; } else if (data_len == 128) { - offset = 4096 - 256 - 320 - data_len; /* Max tail grow 3520 */ + /* Max tail grow 3520 */ + offset = 4096 - 256 - 320 - data_len; + } else if (data_len == 9000) { + offset = 10; + } else if (data_len == 9001) { + offset = 4096; } else { return XDP_ABORTED; /* No matching test */ } diff --git a/tools/testing/selftests/bpf/progs/test_xdp_adjust_tail_shrink.c b/tools/testing/selftests/bpf/progs/test_xdp_adjust_tail_shrink.c index b7448253d135..eeff48997b6e 100644 --- a/tools/testing/selftests/bpf/progs/test_xdp_adjust_tail_shrink.c +++ b/tools/testing/selftests/bpf/progs/test_xdp_adjust_tail_shrink.c @@ -12,14 +12,38 @@ SEC("xdp") int _xdp_adjust_tail_shrink(struct xdp_md *xdp) { - void *data_end = (void *)(long)xdp->data_end; - void *data = (void *)(long)xdp->data; + __u8 *data_end = (void *)(long)xdp->data_end; + __u8 *data = (void *)(long)xdp->data; int offset = 0; - if (data_end - data == 54) /* sizeof(pkt_v4) */ + switch (bpf_xdp_get_buff_len(xdp)) { + case 54: + /* sizeof(pkt_v4) */ offset = 256; /* shrink too much */ - else + break; + case 9000: + /* Multi-buffer test cases */ + if (data + 1 > data_end) + return XDP_DROP; + + switch (data[0]) { + case 0: + offset = 10; + break; + case 1: + offset = 4100; + break; + case 2: + offset = 8200; + break; + default: + return XDP_DROP; + } + break; + default: offset = 20; + break; + } if (bpf_xdp_adjust_tail(xdp, 0 - offset)) return XDP_DROP; return XDP_TX; -- 2.33.1